public void DoAction( AutoTileMap _autoTileMap )
			{
				int tileMinX = _autoTileMap.MapTileWidth-1;
				int tileMinY = _autoTileMap.MapTileHeight-1;
				int tileMaxX = 0;
				int tileMaxY = 0;

				for( int i = 0; i < aTileData.Count; ++i )
				{
					TileData tileData = aTileData[i];
					// save prev tile type for undo action
					tileData.Tile_type_prev = _autoTileMap.GetAutoTile( tileData.Tile_x, tileData.Tile_y, tileData.Tile_layer ).Idx;
					_autoTileMap.SetAutoTile( tileData.Tile_x, tileData.Tile_y, tileData.Tile_type, tileData.Tile_layer );

					tileMinX = Mathf.Min( tileMinX, tileData.Tile_x );
					tileMinY = Mathf.Min( tileMinY, tileData.Tile_y );
					tileMaxX = Mathf.Max( tileMaxX, tileData.Tile_x );
					tileMaxY = Mathf.Max( tileMaxY, tileData.Tile_y );
				}

                if (_autoTileMap.BrushGizmo.IsRefreshMinimapEnabled)
                {
                    _autoTileMap.RefreshMinimapTexture(tileMinX, tileMinY, (tileMaxX - tileMinX) + 1, (tileMaxY - tileMinY) + 1);
                }
				_autoTileMap.UpdateChunks();
			}
        /// <summary>
        /// Save the map configuration
        /// </summary>
        /// <param name="_autoTileMap"></param>
        /// <returns></returns>
		public bool SaveData( AutoTileMap _autoTileMap )
		{
            // avoid clear map data when auto tile map is not initialized
			if( !_autoTileMap.IsInitialized )
			{
				//Debug.LogError(" Error saving data. Autotilemap is not initialized! Map will not be saved. ");
				return false;
			}

			TileMapWidth = _autoTileMap.MapTileWidth;
			TileMapHeight = _autoTileMap.MapTileHeight;
			TileData.Clear();
			for( int iLayer = 0; iLayer < (int)AutoTileMap.eTileLayer._SIZE; ++iLayer )
			{
				List<int> tileData = new List<int>(TileMapWidth*TileMapHeight);
				int iTileRepetition = 0;
				int savedType = 0;
				for( int tile_y = 0; tile_y < TileMapHeight; ++tile_y )
				{
					for( int tile_x = 0; tile_x < TileMapWidth; ++tile_x )
					{
						int iType = _autoTileMap.GetAutoTile( tile_x, tile_y, iLayer ).Idx;

						if( iTileRepetition == 0 )
						{
							savedType = iType;
							iTileRepetition = 1;
						}
						else
						{
							// compression data. All tiles of the same type are store with number of repetitions ( negative number ) and type
							// ex: 5|5|5|5 --> |-4|5| (4 times 5) ex: -1|-1|-1 --> |-3|-1| ( 3 times -1 )
							if( iType == savedType ) ++iTileRepetition;
							else
							{
								if( iTileRepetition > 1 )
								{
									tileData.Add( -iTileRepetition );
								}
								tileData.Add( savedType );
								savedType = iType;
								iTileRepetition = 1;
							}
						}
					}
				}
				// save last tile type found
				if( iTileRepetition > 1 )
				{
					tileData.Add( -iTileRepetition );
				}
				tileData.Add( savedType );

				// 
				TileData.Add( new TileLayer(){ Tiles = tileData } );
			}
			return true;
		}
        /// <summary>
        /// Save the map configuration
        /// </summary>
        /// <param name="_autoTileMap"></param>
        /// <returns></returns>
        public bool SaveData( AutoTileMap _autoTileMap, int width = -1, int height = -1 )
        {
            if (width < 0) width = TileMapWidth;
            if (height < 0) height = TileMapHeight;
            // avoid clear map data when auto tile map is not initialized
            if( !_autoTileMap.IsInitialized )
            {
                //Debug.LogError(" Error saving data. Autotilemap is not initialized! Map will not be saved. ");
                return false;
            }

            Metadata.version = k_version;

            TileData.Clear();
            for( int iLayer = 0; iLayer < _autoTileMap.GetLayerCount(); ++iLayer )
            {
                AutoTileMap.MapLayer mapLayer = _autoTileMap.MapLayers[iLayer];
                List<int> tileData = new List<int>(width * height);
                int iTileRepetition = 0;
                int savedTileId = 0;
                for (int tile_y = 0; tile_y < height; ++tile_y)
                {
                    for (int tile_x = 0; tile_x < width; ++tile_x)
                    {
                        int iType = _autoTileMap.GetAutoTile( tile_x, tile_y, iLayer ).Id;

                        //+++fix: FogOfWar tiles could be < -1, and this is not good for compress system, excepting ids >= -1
                        if (mapLayer.LayerType == AutoTileMap.eLayerType.FogOfWar)
                        {
                            iType = ((iType >> 1) & 0x7FFFFFFF); // remove the last bit of the last byte. Will be << 1 later when loading
                        }
                        //---

                        if( iTileRepetition == 0 )
                        {
                            savedTileId = iType;
                            iTileRepetition = 1;
                        }
                        else
                        {
                            // compression data. All tiles of the same type are store with number of repetitions ( negative number ) and type
                            // ex: 5|5|5|5 --> |-4|5| (4 times 5) ex: -1|-1|-1 --> |-3|-1| ( 3 times -1 )
                            if( iType == savedTileId ) ++iTileRepetition;
                            else
                            {
                                if( iTileRepetition > 1 )
                                {
                                    tileData.Add( -iTileRepetition ); // save number of repetition with negative sign
                                }
                                if( savedTileId < -1 )
                                {
                                    Debug.LogError(" Wrong tile id found when compressing the tile layer " + mapLayer.Name);
                                    savedTileId = -1;
                                }
                                tileData.Add( savedTileId );
                                savedTileId = iType;
                                iTileRepetition = 1;
                            }
                        }
                    }
                }
                // save last tile type found
                if( iTileRepetition > 1 )
                {
                    tileData.Add( -iTileRepetition );
                }
                tileData.Add( savedTileId );

                //
                TileData.Add(new TileLayer()
                {
                    Tiles = tileData,
                    Depth = mapLayer.Depth,
                    LayerType = mapLayer.LayerType,
                    SortingLayer = mapLayer.SortingLayer,
                    SortingOrder = mapLayer.SortingOrder,
                    Name = mapLayer.Name,
                    Visible = mapLayer.Visible
                });
            }
            TileMapWidth = width;
            TileMapHeight = height;
            return true;
        }